Heater box interchange (need to know what to look for)

The controllers mount in the dash differently too. 68 controller mounts with 2 bolts outer ends. 67 has the left bolt tucked in between the fan switch and blend levers. Even the 2 slots in the dang bezel a different length. The 67 levers pivot so they would crash into your 68 bezel. 67 really is one year only. But... Do what you want to make it work I guess.